SCOTLAND: The Big Picture / Kestrel (Falco tinnunculus) female perching on gate in falling snow, Scotland, UK, December.

Sam Hobson / Northern gannets (Morus bassanus) standing behind gate, Bass Rock, Scotland, UK. August

LYNN M. STONE / English Springer Spaniel (show type) on estate grounds, Waterford, Connecticut, USA

LYNN M. STONE / Rottweiler in early autumn on estate grounds, Waterford, Connecticut, USA

Ernie Janes / Beech tree (Fagus sylvatica) in autumn, with gate, Felbrigg Great Wood, Norfolk, UK, November

Cyril Ruoso / Entrance to the Omine Shan Temple constructed on the summit of Sanjogatake Mountain, Yoshino-Kumano National Park, Kansai Region, Japan, November 2008.

Constantinos Petrinos / Main gate of the Aegean Wildlife Hospital with sign. Paros Island, Cyclades, Aegean Sea, Mediterranean, Greece. October 2014

Gary K. Smith / Walkers access gate at the base of Curbar Edge, Peak District National Park, Derbyshire, England, UK, July 2015.

Juan Carlos Munoz / Gate with danger sign warning of land mines, Mount Hermon, Golan Heights, Israel, November.

Loic Poidevin / Entrance to Haras Du Pin, France's oldest national stud, Le Pin-au-Haras, Orne, Lower Normandy, France, November.

Ernie Janes / Five bar farm gate with Bird foot trefoil (Lotus corniculatus), Bramble (Rubus sp) and Horsetails (Equisetum) Norfolk, England, UK. July.

Alex Hyde / Winter scene with gate near Bonsall, Peak District National Park, Derbyshire. December 2014.